CVE-2021-21377

MEDIUM EPSS 52.8%
Published Mar 23, 20215y ago · Modified Jun 17, 20262w ago
5.4 CVSS 3.1
Medium
Find Similar
Published Mar 23, 2021 5y ago
Last Modified Jun 17, 2026 2w ago

Description

OMERO.web is open source Django-based software for managing microscopy imaging. OMERO.web before version 5.9.0 supports redirection to a given URL after performing login or switching the group context. These URLs are not validated, allowing redirection to untrusted sites. OMERO.web 5.9.0 adds URL validation before redirecting. External URLs are not considered valid, unless specified in the omero.web.redirect_allowed_hosts setting.

CVSS Details

Base Score
5.4
Exploitability
2.3
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
52.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-601

Affected Products 1

VendorProductVersionRange
openmicroscopyomero.web* <5.9.0

References 5

  • github.com https://github.com/ome/omero-web/blob/master/CHANGELOG.md#590-march-2021
    Release NotesThird Party Advisory
  • github.com https://github.com/ome/omero-web/commit/952f8e5d28532fbb14fb665982211329d137908c
    PatchThird Party Advisory
  • github.com https://github.com/ome/omero-web/security/advisories/GHSA-g4rf-pc26-6hmr
    Third Party Advisory
  • pypi.org https://pypi.org/project/omero-web/
    Third Party Advisory
  • openmicroscopy.org https://www.openmicroscopy.org/security/advisories/2021-SV2/
    Vendor Advisory

Remediation

  • github.com https://github.com/ome/omero-web/commit/952f8e5d28532fbb14fb665982211329d137908c
    PatchThird Party Advisory